//@author czh
(function(w){ 

	var itemSel = 'pu-item-sel' ;
	var list = $('.pu-item') ;
	list.each(function(){
		$(this).on('click',function(){
			list.removeClass(itemSel) ;
			$(this).addClass(itemSel) ;
		}) ;
	});
	
}(window)) ; 